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https://issues.apache.org/jira/browse/LUCENE-9220?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17037666#comment-17037666
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Robert Muir commented on LUCENE-9220:
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I've uploaded a patch of that same commit against 53739a805cfa6c of snowball.
This way we can refer to it in documentation for now from this issue.
I will make a lucene PR for the lucene-side changes here.
> Upgrade Snowball version to 2.0
> -------------------------------
>
> Key: LUCENE-9220
> URL: https://issues.apache.org/jira/browse/LUCENE-9220
> Project: Lucene - Core
> Issue Type: Wish
> Reporter: Nguyen Minh Gia Huy
> Priority: Major
> Attachments: snowball_53739a805cfa6c.patch
>
>
> When working with Snowball-based stemmers, I realized that Lucene is
> currently [using a pre-compiled version of
> Snowball|https://lucene.apache.org/core/8_4_1/analyzers-common/org/apache/lucene/analysis/snowball/package-summary.html],
> that seems from 12 years ago:
> https://github.com/snowballstem/snowball/tree/e103b5c257383ee94a96e7fc58cab3c567bf079b
> Snowball has just released v2.0 in 10/2019 with many improvements, new
> supported languages ( Arabic, Indonesian…) and new features ( stringdef
> notation for Unicode codepoints…). Details of the changes could be found
> here: https://github.com/snowballstem/snowball/blob/master/NEWS. I think
> these changes of Snowball could give a promising positive impact on Lucene.
> I wonder when Lucene should upgrade Snowball to the latest version ( v2.0).
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